Forbes.com: The World's 50 Most Valuable Sports Teams 2013

#6 New England Patriots

Value: $1.635 billionOwner: Robert Kraft

The Patriots have sold out every game at Gillette Stadium since it opened in 2002 and have more than 60,000 people on a waiting list for season tickets. The Pats increased ticket prices last season for the first time since 2008. Tom Brady (above) and John Elway are the only QBs to start in 5 Super Bowls. (Getty Images)

The team did not increase ticket prices in 2012, despite heavy demand for tickets following a second Super Bowl title in five years. MetLife is paying more than $425 million over 25 years for naming rights to stadium the Giants share with the Jets. (Getty Images)

The team traded three first-round draft picks and a second-round choice to the Rams last year in order to select Robert Griffin III (above) with the second overall pick in the 2012 draft. Griffin delivered by leading the 'Skins to their first division title since 1999. His jersey set a single season record for most sales on NFLShop.com. (Getty Images)

The Dodgers are close to finalizing a 25-year deal with Time Warner Cable worth as much as $8.5 billion. The deal would kick off next season. The Dodgers opening day payroll in 2012 was $105 million, but this year's is over $200 million thanks to a flurry of trades, contract extensions and free agent signings. (Getty Images)

The Patriots have sold out every game at Gillette Stadium since it opened in 2002 and have more than 60,000 people on a waiting list for season tickets. The Pats increased ticket prices last season for the first time since 2008. Tom Brady (above) and John Elway are the only QBs to start in 5 Super Bowls. (Getty Images)

The Cowboys have been the NFL's most valuable team since 2007 thanks to the league's highest sponsorship and premium seating revenues--a combined $200 million. The 'Boys inked QB Tony Romo to a six-year, $108 million contract extension in March despite only one playoff win during his eight years under center. (Getty Images)

The Yankees sold part of their interest in the YES Network in connection with Fox's purchase of 49% of the regional sport network in late 2012. The team's rights fee from YES will increase from $85 million this season to $350 million in 2042 as part of the deal. (Getty Images)

Barca added 21-year-old Brazilian star Neymar (above) in June in a transfer deal worth $74 million. Barcelona's jersey sponsorship deal with Qatar Sports Investments is worth an average of $38 million a year through the 2015-16 season. (AFP/Getty Images)

Manager Alex Ferguson retired this year after leading United to its record 20th league title. Sir Alex was at the helm for 27 years and helped create one of the most valuable brands in sports. The team's record shirt sponsorship deal with General Motors for the automaker's Chevrolet brand kicks off in 2014-15 and is worth $559 million over seven years. (AFP/Getty Images)

Los Merengues finished runner-up this year in La Liga and the Copa del Ray, but nab the title of the world's most valuable sports team thanks to the highest revenues in sports ($650 million during the 2011-12 season). Real inked new deals with Adidas and Emirates Airlines over the last 12 months that will bring in roughly $80 million combined annually. (AFP/Getty Images)